Tire wheel



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May 25 19726.

APatented May 25, 1926.

JULIUS BLASCHKE, F BROOKLYN, NEW YORK.

TIRE WHEEL.

Application led August 27, 1925. Serial My invention relates to vehicle wheels and more particularly to pneumatic tires. The object of my inventionA is to produce a tire which shall have a greater resiliency than the ordinary pneumatic tire now in use and shall be better able to support a load. The tire according to my invention comprises an outer casing formed with a tread surface and an inner tube. The latter is made with two communicating annular air chambers, an outer air chamber extending along'the outer circumference of the tire, and an inner air chamber extending along the inner circumference of the tire. To accommodate the inner air chamber, the rim of the wheel is provided with a detachable with the fixed rim portion an annular compartment adapted to receive the said inner air chamber of the inner tube. It is obvious that by making the inner tube with two air chambers, the volumetric capacity of the inner tube is considerably increased with the resultthat the tire is given a much greater resiliency than lhe ordinary tire aording easier riding and also better able to support a load. Further details will appear from the following description of my invention with reference to the drawing wherein Fig. 1 illustrates a portion of the inner tube showing the outer and inner annular air chamber, Fig. 2 a portion of the inner tube ot' the outer casing and the vehicle rim, Fig. 3

a. portion of a modified vehicle rim, Fig. 4

a threaded-.bolt used for securing the detachable rim portion to the fixed rim portion, Fig. 5 a detail of the wheel rim in section, Fig. 6 a. fragment o a washer-ring and Fig. 7 a section along line 7-7 in Fig. 2. As shown in the drawing, the inner tube 1 `shown alone in Fig. 1 is made so as to form two annular air-chambers, an outer air chamber 2 and an inner air chainer 3, both communicating with each other. y" As shown in Fig. 1 the usual valve L1 is provided for admitting air under pressure to the' inside of the tube 1. To accommodate the inner air chamber 3. the rim of the wheel 5 is formed with a detachable portion '(3 which together with the fixed rim portion 47 forms an an nula` compartment adapted to receive the annui-.1r inner air-chamber 3 of the inner tube 1, wlni.r the outer air-chamber 2 is enclosed by the outer,f"tire casing 8 '.iich is' engaged by the peripheral fianges 9 and 1Q of the detachable and fixed rim-portions rei spectively being held in place thereby.

portion forming The walls of the annular inner air chamber 3 are reinforced as shown at 11 to provide against wear, 1 .The detachable rim portion 6 is formed mi with a radial iian'ge 12 provided with holes at certain intervals to receive the stems of screw-bolts 13, or the like, used for securing the detachable rim portion 6 tothe fixed rim portion 7 which also has holes corresponding to the holes in the radial flange 12. A nut-ring 1.4i is provided, as shown in Figs. 2 and 3, adapted to receive the threaded' stems of the said screw bolts 13. In this way, a very compact and rigid construction of the wheel Arini is produced.

lf desired, a washer-ring 15, such as shown in Fig. 4 can be used to lie against the radial flange 12 of the detachable-rim portion 6 so as to provide a bearing Jfor the heads ot' 75 the screw-bolts 13. The Asaid nut-ringl, of course, has holes 16 corresponding in number to the holes in the radial flange 12 of the detachalile rim portion, for the stems of the screw-bolts 13 to pass through. In addition to the holes 16, smaller holes 17 are provided in the said washer-ning for rivets to pass through, in case it f is desired to ermanently secure the washer-ring 15 to the radial iiange 12 of a detachable rinrpor- S tion 6.

According to Fig. 2, both rim portions (S and 7 are shaped alike. ln the modification illustrated in Fig. 3, the fixed rim portion 7 is formed with a straight wall, whereas the detachable rim portion 6 is a. little more bulged out than as shown' in Fig. 2. This rim construction is used, where lack o' space forbids the fixed rim portion from being made with a, bulging wall. Otherwise the manner otl securing the detachable rim-portion to the iied rim-portion is the same ,as shown in Fig. 2.

ri'he detail crosssection of Fig. 7, is to illustrate that the walls of the riml ortions may be corrugated to give them a ditional strength. I wish it to be understood, of course, that 1 do not limit myself.- to the exact construetion as shown, because Iinay make modifications in my tire within the scope of the elain p without departing from the spirit oi my invention :For example, .the inner chamber ot the tire may. be made largerso as to extend further toward thehub of the wheel. 110

claim as my invention:

1n. a diei; wheel, a single disk, said disk int being curved laterally inwardly adjacent its perimeter, lhence extending parallel to the of the diska thence curved inwardly outwardly 'in close proximity to the l iineter defining a. rim flange, u separable @i section secured to the disk at the inner ierminus of said curved portions of said iiiskgsaid separable rim section being curved comple-mentally ingress section to said disk curved portions forming with the curved portions of the disk an annular compartment inwardly from the disk perimeter having a constrir'ted portion in Close proximity to the perimeter.

ln testimony whereof I :illix in v signnure.

JULIUS BLASCHKE. 

